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Parker Hydraulic Hose Decoder

Type a Parker 4400 hose part number (387-8, 471TC-6, 302-16, 797-16) and read the hose ID, OD, the working pressure for that exact size, minimum bend radius, construction, cover, and the matching fitting series. Built around the trap that a legacy hose drops its pressure as the size grows, so the rating has to be read per size, not per series.

A calculator for selected Parker Catalog 4400-style hydraulic hose marks. Type a supported mark (a 3-digit series, an optional TC or ST cover suffix where applicable, a dash size, and an optional twin dash) and the app returns cached local prompts for family, spec label, hose ID, Parker-published metric dimension, OD, working-pressure row, minimum bend radius, construction, cover context, fitting-series prompt, vacuum row where cached, and pressure-behavior label. The lookup key is still the (series, dash) pair because legacy SAE-style rows can drop working pressure as ID grows, but every output is framed as a source prompt. Current Parker catalog data, current CrimpSource/tooling data, supplier availability, the marked hose, fluid, temperature, routing, OEM requirements, inspection, and qualified hose-assembly review control any order, assembly, or pressurization decision.

Pro Tip: Use the decoded row to catch review traps, not to approve a build. The dash is a hose-ID prompt in 1/16 inch, so -8 means 8/16 = 1/2 inch, while fitting and thread sizes have their own assembly designations. Legacy SAE-style rows can be size-varying, so a small-size pressure row cannot be carried to a larger hose. GlobalCore rows are cached as constant-pressure prompts. TC and ST are cover features, not pressure upgrades. Verify all of those prompts against the current Parker catalog, CrimpSource/tooling data, hose marking, selected fittings, fluid, temperature, routing, machine OEM, and qualified review before use.

Read the Parker hose guide for 4400-style marks, cover prompts, pressure behavior, and crimp/source gaps

Parker Hydraulic Hose Guide →

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Parker Hydraulic Hose Decoder
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How It Works

  1. Type the mark

    Enter a supported Parker 4400-style hose mark: the 3-digit series, an optional cover suffix (TC or ST where supported), the dash size, and an optional second dash for a twin line. Examples: "387-8", "471TC-6", "722TC-20", "471TC-6-6". Lowercase and spaces are tolerated, then bounded before state, reports, and exports use them.

  2. Read the size prompt

    The Size and dimensions card shows the dash as a hose-ID prompt in 1/16 inch, in both fraction inch and Parker-published mm where cached, plus outside diameter and spec-label context. Published product rows remain the source; the app does not certify a dimension.

  3. Read the working-pressure prompt

    The Pressure and bend card shows the cached working-pressure row, minimum bend-radius row, and vacuum row where present. A callout labels constant-pressure versus size-varying behavior, but pressure, burst, impulse, temperature, fluid, and equipment suitability still require current Parker/manufacturer and qualified review.

  4. Check construction and cover prompts

    The Construction and cover card shows cached reinforcement, cover, and temperature-range context. TC and ST are flagged as cover features rather than pressure upgrades, while cover suitability, abrasion, routing, clamps, guards, and environment remain source gaps.

  5. Read the fitting-series prompt

    The Fittings card lists cached fitting-series prompts and flags Push-Lok push-on rows. Crimp diameter, die, insert, fitting compatibility, inspection, proof test, and assembly acceptance come from current Parker tooling/CrimpSource data and qualified hose-shop review, not this calculation.

  6. Export the decode

    PDF export produces a branded report with the cached prompts, field notes, source warnings, residual gaps, and source pointers. CSV/share carry the same bounded input context for review, not build authorization.

Built For

  • A mechanic documenting source checks for a hose stamped "302-16" before a qualified hose shop builds a replacement
  • A hydraulics tech catching that a 422-32 cached row differs from a small-size 422 row before current-catalog review
  • A parts buyer decoding "471TC-6" as a ToughCover prompt before supplier and substitution review
  • A field tech telling a GlobalCore 722-8 (4000 psi, constant) from a 722TC-20 (R12 4-spiral, size-varying), which are different hoses that share the leading number
  • An estimator decoding "471TC-6-6" and catching that it is a bonded twin line, not two single hoses
  • A maintenance planner confirming an 811-16 is a low-pressure suction hose with a vacuum rating, not a pressure line
  • A shop hand decoding "801-8" and learning it is a Push-Lok push-on prompt that needs current fitting data instead of a crimp guess
  • A reliability engineer pulling the cached 387 size table into a PDF for fleet-document review before OEM, catalog, and supplier checks

Features & Capabilities

Per-Size Working-Pressure Prompts

The calculator uses cached (series, dash) rows rather than one number for a series. On size-varying legacy rows, that keeps the review prompt tied to the dash size. The app still does not certify pressure, burst, impulse, temperature, fluid, or application suitability.

GlobalCore vs Legacy, Labeled

Every matched result labels whether the cached row behaves like a constant-pressure GlobalCore row or a size-varying legacy row. The label is review context only; current catalog, hose marking, and product data still control.

Cover Suffix Decoded as a Feature, Not a Pressure

TC and ST are decoded as cover-feature prompts. The app does not treat a cover suffix as a pressure upgrade, and it leaves abrasion, routing, temperature, and environment suitability for current source and qualified review.

The 722 vs 722TC Distinction

The cached rows preserve the 722/722TC distinction by dash-size context so a leading number is not treated as enough information. Current catalog revision and hose marking still have to be checked before substitution or ordering.

Twin Line and Push-Lok Flags

A trailing second dash is flagged as a bonded twin-line prompt. Push-Lok and suction rows are flagged so low-pressure and no-crimp source gaps are visible rather than silently treated as ordinary crimped pressure hoses.

Never Fabricates a Pressure

If a recognized series lacks the entered size in the cached rows, the decoder says so instead of interpolating or guessing a working pressure. That avoids inventing a safety-relevant value.

PDF and CSV Export with Source Gaps

PDF export uses the shared ToolGrit programmatic generator and includes cached prompts, source warnings, residual source gaps, and source pointers. CSV/share carry review context; neither is a build, purchase, or installation authorization.

Light and Dark Mode, WCAG AA

Standard ToolGrit light and dark theme with WCAG AA contrast on the pressure-behavior callouts, verified in both themes. The matched banner and the pressure card use aria-live regions so screen readers announce the decode and the pressure when the part number changes. The mobile layout at 375 px keeps the cards readable.

Comparison

Series Spec Behavior WP at -8 WP at -32 Crimp
187 ISO 18752 GlobalCore Constant 1000 psi 1000 psi yes
387 ISO 18752 GlobalCore Constant 3000 psi 3000 psi yes
797 ISO 18752 GlobalCore Constant 6000 psi 6000 psi yes
302 SAE 100R2 / ISO 2SN Size-varying 4000 psi 1150 psi yes
422 SAE 100R1 / ISO 1SN Size-varying 2325 psi 575 psi yes
471TC ISO 2SC / EN 857 Size-varying 4250 psi n/a (to -16) yes
722TC SAE 100R12 / R12 Size-varying n/a (-20 up) 2500 psi yes
811 SAE 100R4 suction Low pressure n/a (-12 up) 100 psi yes
801 Push-Lok multipurpose Low pressure 300 psi n/a NO (push-on)

References

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Frequently Asked Questions

It is the hose inside diameter in 1/16 inch. So -8 is 8/16 inch, which is 1/2 inch; -16 is 16/16, which is 1 inch. This is the hose ID. The fittings and threads on the assembly have their own size designations in separate boxes of the full part number, so the hose dash is not automatically the fitting or thread dash.
On a legacy SAE hose (302, 422, 471, 482), the reinforcement is sized to the hose, and a bigger ID at the same wall holds less pressure, so the working pressure drops as the size grows. A 422-4 is 3250 psi and a 422-32 is 575 psi, the same hose, a 5.6x spread. That is why you have to read the rating for the exact size. GlobalCore series (187, 387, 487, 722, 777, 787, 797) are engineered to hold one working pressure across the whole size range, which is the point of that family.
They are cover styles. TC is ToughCover, a more abrasion-resistant cover (about 80 times standard rubber per ISO 6945). ST is SuperTough, the most abrasion-resistant cover (about 450 times standard), for severe rub. Neither changes the working pressure, the ID, or the bend radius of the hose. They protect the cover in a harsh routing. The decoder strips the suffix to find the base hose and reports the base pressure.
It depends on the size, which is the trap. In the small sizes, 722 and its 722TC and 722ST tough-cover versions are the GlobalCore 4000 psi constant-pressure hose. In the large sizes (-20, -24, -32), 722TC and 722ST are the SAE 100R12 four-spiral, a size-varying hose, a different product that shares the leading number. So 722TC-8 is the GlobalCore hose with a ToughCover, while 722TC-20 is the R12. The decoder reads the dash to pick the right table.
It is a bonded twin line: two hoses joined side by side, common on equipment where two lines run together. The first dash is the hose ID (here -6, 3/8 inch) and the repeated dash indicates the twin construction. Order and route it as a twin, not as two separate single hoses.
No. It can show a cached fitting-series prompt, but the exact fitting, die, insert, crimp diameter, inspection, proof-test, and assembly acceptance come from current Parker tooling/CrimpSource data for the specific hose and fitting combination. Use the calculator to identify source gaps before a qualified hose shop reviews the assembly.
No. The cached working-pressure row is not burst pressure, proof-test approval, impulse-life approval, temperature derating, or safe-to-pressurize instruction. Verify current manufacturer data and application conditions before any hydraulic use.
Disclaimer: This source-aware screen compares supported Parker 4400-style hose marks with cached local rows and source pointers. It does not certify a hose, approve a substitute, select a coupling, set a crimp, verify fluid compatibility, derate for temperature, approve routing, provide lockout/depressurization instructions, authorize pressure testing, or make a safe-to-pressurize decision. Always verify the marked hose, current Parker catalog, current CrimpSource/tooling data, selected fittings, fluid, temperature, OEM requirements, inspection, proof test, and site safety controls with a qualified fluid-power professional or hose shop before ordering, assembling, installing, or pressurizing. ToolGrit is not affiliated with Parker Hannifin.

Learn More

Industrial

Parker Hydraulic Hose Guide: The 4400 Part Number, GlobalCore vs Legacy Pressure, TC/ST Covers, and Fittings

Plain-language Parker Catalog 4400 hose reference. How to read the series, cover, and dash (the dash is the hose ID in 1/16 inch); why a legacy SAE hose drops its working pressure as the size grows while GlobalCore holds a constant pressure; what the TC and ST covers change; the 722 vs 722TC trap; and why the matching fitting series shifts with size. Companion to the Parker Hydraulic Hose Decoder.

Read Guide →

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